WO2008013434A1

WO2008013434A1 - A skate board

Info

Publication number: WO2008013434A1
Application number: PCT/KR2007/003659
Authority: WO
Inventors: Kyung Nam Shin; Seong Won Moon
Original assignee: Kyung Nam Shin; Seong Won Moon
Priority date: 2006-07-28
Filing date: 2007-07-30
Publication date: 2008-01-31
Also published as: KR100757517B1

Abstract

Disclosed is a skateboard, in which decks spaced apart from each other by a joint shaft are mounted thereunder with directional casters, and thus when any one of the decks is rolled, the decks obtain a propellant force to perform turning motion or forward and backward motion, and more particularly in which decks spaced apart from each other by a joint shaft are folded by simple manipulation on the basis of stability of leftward and rightward rolling of the decks, of the accurate transmission of a propellant force generated when the leftward and rightward rolling is performed, and of the rotation of opposite ends of the joint shaft with respect to the decks.

Description

Description A SKATE BOARD

Technical Field

[1] The present invention relates to a skateboard use sports and play, in which decks spaced apart from each other by a joint shaft are mounted thereunder with directional casters and the decks obtain a propellant force to perform turning motion and more particularly to a foldable skateboard, in which decks spaced apart from each other by a joint shaft are folded by simple manipulation on the basis of prevention of joint shaft moving freely by elatstic block in leftward and rightward rolling. Background Art

[2] Currently, the skate board which have the propellant force to the leftward and rightward in use of twist of rolling, as seen Figure 13, it is handled by both feet on the upper of deck (100, 100a) which aparts from each other spaced distance both feet open, which is connected to the joint shaft (200) with elastic bar or the leaf spring having twist and to drive twist from the above joint shaft(200), the opposite ends was fixed to unable to moving freely on the bottom of deck (100, 100a), and thus for the smoothn twist of joint shaft(200) having the distance was the major axis. In order to facilitate the twist, the joint shaft must be mounted under the decks at a long length, and furthermore one end of the joint shaft must be fixed. For this reason, it is impossible to realize means for folding the skateboard. Disclosure of Invention Technical Problem

[3] Accordingly, the present invention has been made in an effort to solve the problems occurring in the related art, and the present invention is directed to movably mount a shot joint shaft without a twist in the state in which opposite ends of the joint shaft are disposed at first ends of decks and thus are prevented from separation, fit elastic blocks around protrusion pins at the opposite ends of the joint shaft in order to balance the decks when the decks obtain a propellant force by movement of the casters, cause the opposite ends of the joint shaft having the elastic blocks to be enclosed by rotators, cause the rotators to be held in holders that rotatably hold the rotators and are installed on lower surfaces of the first ends of the decks, and allow the rotators held in the holders to be rotated and fixed by a regulating means installed in the middle of the joint shaft. Technical Solution

[4] Further, the regulating means is directed to regulate rotation of the rotators, which are installed on the opposite ends of the joint shaft, in the holders, in which pistons, mounted in a cylinder of the joint shaft, move toward and away from each other by manipulation of a manipulation lever installed in the middle of the joint shaft, and thus come in and out of through-holes of the holders, thereby easily folding the skateboard.

Advantageous Effects

[5] The skateboard of the present invention comprises the joint shaft which is short without a twist and is coupled to the ends of the decks, thereby saving production costs. Further, the skateboard causes the pistons to come in and out of the joint shaft, and thus is be folded by simple manipulation, so that it can be easily stored and carried.

Brief Description of the Drawings [6] FIG. 1 is a perspective view illustrating a assembly skateboard of the present invention; [7] FIG. 2 is a perspective view illustrating a joint shaft of the present invention, on which a manipulation lever is mounted; [8] FIG. 3 is an exploded perspective view illustrating the assembly of the present invention; [9] FIG. 4 is a view illustrating the operation of pistons performed by manipulation of the present invention; [10] FIG. 5 is a side view illustrating the positions of pistons when a skateboard of the present invention is unfolded; [11] FIG. 6 is a side view illustrating the positions of pistons when a skateboard of the present invention is folded; [12] FIG. 7 is an assemblied perspective view illustrating a skateboard of the present invention which has a ratoator in a holder; [13] FIG. 8 is a perspective view illustrating a folded skateboard of the present invention; [14] FIG. 9 is a view illustrating the state before rotators are coupled to a joint shaft of the present invention; [15] FIG. 10 is a sectional view illustrating the state in which propellant are assembled in the present invention;

[16] FIG. 11 is a perspective view illustrating of propellant in the present invention;

[17] FIG. 12 is an exploded perspective view illustrating the state that rotators are connection with elastic block in the present invention; and [18] FIG. 13 is a schematic view illustrating the configuration of a skateboard in prior art.

[19] <Description of symbols of the main parts in the drawings>

[20] 10: deck 11: caster

[21] 12: recess 20: joint shaft [22] 21: cylinder 22: piston

[23] 23: guide plate 24: guide hole

[24] 25: guide pin 26: slot

[25] 27: recess 28: clamping furrow

[26] 29: projection 30: rotator

[27] 31: fastening means 32: receiving face

[28] 33: coupled face 34: inner cavity

[29] 35: elastic block 36: elastic-direction pin

[30] 40: holder 41: wall

[31] 42: cover 43 : through-hole

[32] 44: curved face 45: opening

[33] 46: boss 47: reinforcing bracket

[34] 48: inclined reinforcement 50: manipulation bar

[35] 51: clamped ridge 52: fixing hole

[36] 53: fixing pin

Best Mode for Carrying Out the Invention

[37] Hereinafter, an embodiment of the invention will be described in detail with reference to the accompanying drawings.

[38] FIGS. 1 and 8 illustrate an unfolded skateboard and a folded skateboard of the present invention. FIG. 3 is an exploded perspective view illustrating the state in which a regulating means for folding a skateboard is installed on a joint shaft. FIG. 7 illustrates the state in which a joint shaft, on which a regulating means and rotators are mounted, is held in holders formed at first ends of decks. FIG.12 illustrate the state in which rotators are mounted on a joint shaft having a regulating means.

[39] As illustrated in FIG. 7, the skateboard of the present invention comprises front and rear decks (10) and (10a), each of which is provided with a caster (11), and a joint shaft (20), which is coupled to the front and rear decks (10). As illustrated in FIGS. 2 and 3, the joint shaft has the shape of a tube, and comprises a cylinder (21) into which pistons (22) are inserted, a slot (26) formed in the middle of the cylinder (21), a guide plate 23 having guide holes 24, each of which is inclined in one direction,

[40] At this time, the guide plate (23) is surrounded by a manipulation lever (50). The manipulation lever (50) is fixed to the guide plate (23) by a fixing pin (53) coupled into a coupling hole (23 a) of the guide plate (23) on the outside of the manipulation lever (50) so as to be rotated together with the guide plate (23), so that the guide plate is simply operated by the manipulation of the manipulation lever (50).

[41] Here, the guide plate (23) is provided with a clamping furrow (28), and the manipulation lever (50) is provided with a clamped ridge (51). The manipulation lever (50) is fitted around the guide plate (23) in one direction of the joint shaft (20), and thereby the clamped ridge (51) is engaged with the clamping furrow (28), so that the manipulation lever (50) and the guide plate (23) can be rotated in the same direction.

[42] For the purpose of form coupling in the engaged state, the fixing pin (53), which pass through a fixing hole (52) of the manipulation lever (50), is coupled into the coupling hole (23a) of the guide plate (23) on the outside of the manipulation lever (50), so that the manipulation lever (50) is firmly coupled to the guide plate (23), and thus is operated simultaneously with the guide plate.

[43] The joint shaft (20) is provided with a recess (27), within which the slot is formed, such that the guide plate (23) is rotated in place without axial displacement. In order to bring the guide plate (23) into close contact with the recess (27), the guide plate (23) is divided into two equal parts, which are coupled with each other.

[44] Preferably, a depth of the recess (27) is nearly equal to a thickness of the guide plate

(23).

[45] In the state in which the manipulation lever (50) is assembled, as illustrated in

FIGS. 9, 11 and 12, the rotators 30, which enclose the opposite ends of the joint shaft (20) when mounted, have a cylindrical shape so as to be rotatable in the holders (40). As illustrated in FIG. 7, the rotators 30 are held in the holders (40) of the front and rear decks, which have the equally enclosing shape so as to be rotatable, and each holder (40) is provided with a through-hole (43) in the rear thereof such that the pistons (22) reciprocating in the cylinder (21) can come in and out.

[46] Thus, the rotators (30) are rotated in the holders 40 while the pistons (22) come in and out of the through holes (43), and thereby the decks (10) and (10a) are folded or unfolded. In the folded case, the skateboard can be stored or carried.

[47] Here, each of the rotators (30), which are in an equally divided state, includes receiving faces (32), which closely enclose the opposite ends of the joint shaft (20), and coupled faces (33), which are firmly coupled to maintain a predetermined assembly pressure, for example, by fastening. Each rotator (30) is provided with coupling holes (37) in the respective coupled face (33), and fastening holes (38) on the side opposite the respective coupled face (33), wherein the coupling holes (37) communicate with the fastening holes (38). Thereby, the rotators 30 are coupled to each other at the rear of the fastening holes by fastening means (31) such as screws or bolts.

[48] Thus, when the decks (10) and (10a) are rolled left and right, the paired rotators

(30) are held in the holder (40), which is formed at one end of each of the front and rear decks (10) and (10a), so as to make it impossible to move left and right. When the front and rear decks (10) and (10a) are rolled, the protrusion pins (36), which protrude from each end of the joint shaft, are inserted in the elastic blocks (35), and each elastic block 35 is received in the inner cavity (34). Thereby, the front and rear decks are easily balanced because the joint shaft is supported by the elastic blocks. When the decks are forced to be rolled, a propellant force is generated by pitching or rolling of the casters. This propellant force causes the joint shaft to be rotated, so that stable rolling is carried out.

[49] Further, the covers (42) of the holders (40) are coupled so as to enclose the walls

(41) of the holders (40) such that the through-holes (43) of the holders (40) can withstand the great load applied when the rotation of the rotators (30) is regulated while the pistons (22) come in and out. Each cover (42) comprises an inclined reinforcement (48) at the rear thereof. A reinforcing bracket (47), which has a through-hole (43a) and is made of a steel plate, is installed at the rear of the wall (41) of each holder (40).

[50] Also, each rotator (30) is covered by a cover (42), which has an opening (45) and is engaged with a holder (40) in order to be rotatably held in the holder (40) and is folded in one direction.

[51] At this time, the reinforcing bracket (47)is adapted to be inserted in a recess (12) formed in the lower surface of each of the first ends of the decks (10) and (10a) so as to provide the strong supporting force. Mode for the Invention

[52] Thus, when the manipulation lever (50) is turned in a forward direction in order to store or carry the skateboard, the guide plate (23) fixed by the manipulation lever (50) and the fixing pin (53) is rotated. Further, the guide pins (25) inserted into the guide holes (24) are coupled with the pin-fixing holes (22a) of the pistons (22). Hence, as the guide pins 25 moves toward each other, the pistons (22), which have protruded outside, moves toward each other, and come out of the through-holes (43) and (43a). Thereby, the rotators (30) of the joint shaft (20) are rotated, and the skateboard is folded. In contrast, in the case in which the skateboard is to be unfolded for use, the manipulation lever (50) is turned in a reverse direction, and thus is operated reversely. Then, the pistons (22) are inserted into the through-holes (43) and (43a), and thereby the rotators (30) are not rotated. When the decks (10) and (10a) are rolled left and right, the protrusion pins (36) formed at the opposite ends of the joint shaft (20) obtain the supporting force from the elastic blocks (35) received in the inner cavities (34). Thereby, the decks can be stably balanced. Simultaneously, the joint shaft (20) is endowed with a rotating force, and thereby the decks obtain the propellant force derived from the casters as well as a repulsive force of the elastic blocks. At this time, the elastic blocks received in the inner cavities of the rotators (30) exert an elastic force in a leftward or rightward direction even in the case in which a strong force is not applied, so that the decks can be rolled with a weak force. Industrial Applicability

[53] The skateboard of the present invention comprises the joint shaft which is short without a twist and is coupled to the ends of the decks, thereby saving production costs. Further, the skateboard causes the pistons to come in and out of the joint shaft, and thus is be folded by simple manipulation, so that it can be easily stored and carrie.

Claims

[1] A foldable skateboard comprising: front and rear decks (10 and 10a), each of which includes a directional caster (11) that is free to move; a joint shaft (20), which is coupled to the front and rear decks (10 and 10a) so as to be able to seperate with a distance; wherein the joint shaft has a shape of a tube in order to regulate folding at the opposite ends thereof, and comprises a cylinder (21) into which pistons (22) are inserted, a slot (26) formed in the middle of the cylinder (21) in order to regulate forward and backward insertion of the pistons (22) into the cylinder (21), a rotatable guide plate (23) having guide holes (24), each of which is inclined in one direction, and covering the slot (26), and guide pins (25) inserted through the guide holes (24) and the slot (26), the guide plate (23) insulting inside of a manipulation lever (50) and fixing with fixing fin(53) outside of a manipulation lever (50), so that the pistons (22) move into and out of the by a manipulation lever (50) and through-holes (43) of the holders (40) and the joint shaft (20) is rotated in state of receiving in receiving face in order to fold the skateboard.

[2] The foldable skateboard according to claim 1, wherein: the guide plate (23) comprises a clamping furrow (28); and the manipulation lever (50) comprises a clamped ridge (51), is fitted around the guide plate (23) in one direction of the joint shaft (20), and is integrally coupled with the guide plate (23) by a fixing pin (53), which passes through a fixing hole (52) and is inserted into a coupling hole (23a) of the guide plate (23) on an outside of the manipulation lever (50).

[3] The foldable skateboard according to claim 1 or 2, wherein the joint shaft (20) comprises a recess (27), within which the slot (26) of the joint shaft (20) is formed, such that the guide plate (23) is fitted and rotated in place.

[4] The foldable skateboard according to claim 3, wherein the guide plate (23) fitted in the recess (27) is divided into two equal parts, which are coupled with each other, in order to bring the guide plate (23) into close contact with the recess (27).

[5] The foldable skateboard according to claim 1, wherein: the rotators (30) have a cylindrical shape; and the holders (40), which have the same shape as the rotators and the rear part of the holders (40) having a through-hold (43) in order piston (22) to come in or out.

[6] The foldable skateboard according to claim 4, wherein: the cover of holder is coupled by couping means in down part of deck.

[7] The foldable skateboard according to claim 4 or 5, wherein each holder (40) comprises a boss (46) at one end thereof.

[8] The foldable skateboard according to claim 1, wherein each of the rotators (30), which are mounted on the opposite ends of the joint shaft(20) and are in an equally divided state, comprises receiving faces (32), which closely enclose the opposite ends of the joint shaft (20), coupled faces (33), which are formed to maintain a predetermined assembly pressure, coupling holes (37) in the respective coupled face (33), and fastening holes (38) on a side opposite the respective coupled face (33), so that the rotators (30) are coupled to each other at a rear of the fastening holes (38) by fastening means(31) as a screw or a bolt.

[9] The foldable skateboard according to one of claim 1, claim 5 or claim 8, wherein the rotators (30), which enclose the opposite ends of the joint shaft (20), comprise inner cavities (34); the elastic block (35) is received in each inner cavity (34); and each of the protrusion pins (36), which protrude from the opposite ends of the joint shaft (20) in directions perpendicular to an axis of the joint shaft, is inserted into the elastic block (35).

[10] The foldable skateboard according to claim 1 or claim 6, wherein the covers (42) of the holders (40) are coupled so as to enclose walls (41) of the holders (40) such that the throught-holes (43) of the holders (40) can withstand the great load applied when the ratation of the rorators (30) is regulated while the pistons (22) come in and out, and comprise inclined reinforcements (48), each of which has a through-hole (43a) in use of steel, at a rear of wall (41) thereof.

[11] The foldable skateboard according to one of claim 1, claim 5 or claim 10, wherein the above rotator may is rotated within holder (40), a cover (42) of holder is installed opening (45)and the rotator is rotated to the one-direction.

[12] The foldable skateboard according to claim 10, wherein reinforcing bracket (47) is inserted in a recess (12) formed in a lower surface of each of the first ends of the decks (10 and 10a) so as to provide a strong supporting force.